JNET::JSelect Class Reference

Wrapper class for select call. More...

#include <JSelect.hh>

Inheritance diagram for JNET::JSelect:

Public Member Functions
	JSelect ()
	Default constructor. More...
void	reset ()
	Reset. More...
bool	operator() ()
	Infinite wait select call. More...
bool	operator() (JTimeval timeout)
	Select call. More...
int	operator() (JTimeval *timeout)
	Select call. More...
JFileDescriptorMask &	getReaderMask ()
	Get reader mask. More...
void	setReaderMask (const JAbstractFile &file)
	Set reader mask. More...
bool	hasReaderMask (const JAbstractFile &file) const
	Has reader file. More...
int	operator() (timeval *timeout=NULL)
	Select call. More...
JFileDescriptorMask &	getWriterMask ()
	Get writer mask. More...
void	setWriterMask (const JAbstractFile &file)
	Set writer mask. More...
bool	hasWriterMask (const JAbstractFile &file) const
	Has writer file. More...
int	operator() (timeval *timeout=NULL)
	Select call. More...

Protected Attributes
JFileDescriptorMask	readerMask
JFileDescriptorMask	writerMask

Detailed Description

Wrapper class for select call.

Definition at line 34 of file JSelect.hh.

Constructor & Destructor Documentation

JSelect()

JNET::JSelect::JSelect ( )

inline

Default constructor.

Definition at line 42 of file JSelect.hh.

              :
      JSelectReader(),
      JSelectWriter()
    {}

Member Function Documentation

reset()

void JNET::JSelect::reset ( )

inline

Reset.

Definition at line 51 of file JSelect.hh.

    {
      static_cast<JSelectReader&>(*this).reset();
      static_cast<JSelectWriter&>(*this).reset();
    }

operator()() [1/5]

bool JNET::JSelect::operator() ( )

inline

Infinite wait select call.

Returns

true if data can be read or written; else false

Definition at line 64 of file JSelect.hh.

    {
      return this->operator ()(0);
    }

operator()() [2/5]

bool JNET::JSelect::operator() ( JTimeval  timeout )

inline

Select call.

Parameters

timeout

timeout

Returns

true if data can be read or written; else false

Definition at line 76 of file JSelect.hh.

    {
      return this->operator ()(static_cast<JTimeval*>(static_cast<void*>(&timeout)));
    }

operator()() [3/5]

int JNET::JSelect::operator() ( JTimeval *  timeout )

inline

Select call.

Returns

number of valid file descriptors

Definition at line 87 of file JSelect.hh.

    {
      int nfds = std::max(readerMask.getNumberOfFileDescriptors(),
                          writerMask.getNumberOfFileDescriptors());
 
      nfds += 1;
      nfds  = ::select(nfds, &readerMask, &writerMask, NULL, timeout->get());
 
      if (nfds != 0) {
 
        if (nfds < 0) {
 
          readerMask.reset(true);   // hard reset
          writerMask.reset(true);   // hard reset
 
          if (errno != EINTR) {
            THROW(JSelectException, "select(..) failed " << nfds << "; errno = " << errno);
          }
        }
 
      } else {
 
        readerMask.reset(false);    // soft reset
        writerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

getReaderMask()

JFileDescriptorMask& JNET::JSelectReader::getReaderMask ( )

inlineinherited

Get reader mask.

Returns

mask

Definition at line 46 of file JSelectReader.hh.

    {
      return readerMask;
    }

setReaderMask()

void JNET::JSelectReader::setReaderMask ( const JAbstractFile &  file )

inlineinherited

Set reader mask.

Parameters

file

file

Definition at line 57 of file JSelectReader.hh.

    {
      readerMask.set(file);
    }

hasReaderMask()

bool JNET::JSelectReader::hasReaderMask ( const JAbstractFile &  file ) const

inlineinherited

Has reader file.

Parameters

file

file

Returns

true if file set; else false

Definition at line 69 of file JSelectReader.hh.

    {
      return readerMask.has(file);
    }

operator()() [4/5]

int JNET::JSelectReader::operator() ( timeval *  timeout = NULL )

inlineinherited

Select call.

Parameters

timeout

timeout

Returns

number of valid file descriptors

Definition at line 102 of file JSelectReader.hh.

    {
      int nfds = readerMask.getNumberOfFileDescriptors();
 
      nfds += 1;
      nfds  = ::select(nfds, &readerMask, NULL, NULL, timeout);
 
      if (nfds != 0) {
 
        if (nfds < 0) {
          if (errno != EINTR) {
            THROW(JSelectException, "JSelectReader(..) failed.");
          }
        }
 
      } else {
 
        readerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

getWriterMask()

JFileDescriptorMask& JNET::JSelectWriter::getWriterMask ( )

inlineinherited

Get writer mask.

Returns

mask

Definition at line 46 of file JSelectWriter.hh.

    {
      return writerMask;
    }

setWriterMask()

void JNET::JSelectWriter::setWriterMask ( const JAbstractFile &  file )

inlineinherited

Set writer mask.

Parameters

file

file

Definition at line 57 of file JSelectWriter.hh.

    {
      writerMask.set(file);
    }

hasWriterMask()

bool JNET::JSelectWriter::hasWriterMask ( const JAbstractFile &  file ) const

inlineinherited

Has writer file.

Parameters

file

file

Returns

true if file set; else false

Definition at line 69 of file JSelectWriter.hh.

    {
      return writerMask.has(file);
    }

operator()() [5/5]

int JNET::JSelectWriter::operator() ( timeval *  timeout = NULL )

inlineinherited

Select call.

Parameters

timeout

timeout

Returns

number of valid file descriptors

Definition at line 102 of file JSelectWriter.hh.

    {
      int nfds = writerMask.getNumberOfFileDescriptors();
 
      nfds += 1;
      nfds  = ::select(nfds, NULL, &writerMask, NULL, timeout);
 
      if (nfds != 0) {
 
        if (nfds < 0) {
          if (errno != EINTR) {
            THROW(JSelectException, "JSelectWriter(..) failed.");
          }
        }
 
      } else {
 
        writerMask.reset(false);    // soft reset
      }
 
      return nfds;
    }

Member Data Documentation

readerMask

JFileDescriptorMask JNET::JSelectReader::readerMask

protectedinherited

Definition at line 127 of file JSelectReader.hh.

writerMask

JFileDescriptorMask JNET::JSelectWriter::writerMask

protectedinherited

Definition at line 127 of file JSelectWriter.hh.

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The documentation for this class was generated from the following file:

• JSelect.hh